Bridge-wall for furnaces.



T. WAKEFIELD.

BRIDGE WALL FUR FURNACES.

APBLICATIU'N FILED DEc.21.191-.

Patented Deq.1s,1917.

BY f

. n ATTORNEY l f mimmo wnnnnnnn, :on nimmonn; NEW onmnssinno, To iiiiiznir'n. omnia' :E

To all' @nimm zmay com/fem.

, 35e tmown that I; THOMAS 'WAnEFmLm asubjact of the King of Garant BritainJ tof si'dngat Filmore, in tho-county ofl ll'e' ganynnd State of New Yoik, have' invented a new and useful Brdgo-W'ai for Furnaces,

of which the following' is a spcification.,

This invention' has yrefm'nritxfe, to bridge Wails for fnmaos, and its Objectis 'tof provide :1 brd o Wal which may replace brick britge wai s, and at the same time cause smoke from the fino t0 be consumed.

, n nocodanoo with the vpresent', invention dm3 bridge ,Wall is a structure distinct from the grate bars or other supports, so that the grate may be rapimenti or wholly changed in @nannten Without onct uponthe bridge wall or any pant of it The bridgolwalincludes swiss of bam mounted'in indined position, oustonmry, andi col'antrnate; to provide for the pasiago airbetweenthem; Asso l fztad 'with angl underlying thov bridge Wl isf-irais a dmpnnstmctursso constructed hat a termin minimum' amonntof air 'will ..1 always passthrongh, the clennngn;y from the vva11`bars,

ahpit to and between the brii go Whia the air flow may be increasedjrom noch minimum amount to a nmxlmllm amount, at will, Furthexmoro the` domper i@ ,so arranged that ashes 'falin throngh the: spaces betwenths bridger wa] hars may *no di-reotodintofthe' ash pit, Wheeby aommuntions vlof 'sahen netween the bridge Wall Mrs is avoidoti, A

mem er which in th'l instlledtnntn chmrges rii nloniioatoniqonio:vnhthin hel l'sco Blof the appended.'inhuman.;ix

parts' of tho view Flg' 2 l Ai2.'"flrspe@tive. view h f port for .the bridge Wallfvbarg.-V

structure 4. Thefwall 13 lfwxsl` s'ure'd, it

aigle manipnlatingmens ma? be ro'vidd fr' ac tlmtmgrtne daxpex: anzi in t o`draw lugs such mgmpulatm'g means are simply `10 tire bridge, as would be the case it it were l'indicated by a manipulating reach rod 14 4the bars. At one end each bar 16 is formed with a hook projection 19 arranged tohook over tl e ulb bivhile the other e'nd 20 of the bar is siiaped to rest on the plate 5 near the edge thereof remote from the wall 3, this construction being such that the 'bridge bars incline ata suitable angle. Adjacent tothe hook 19 each bar 1G is formed with a notch 21 permitting airfto flow close to the hook end, thus keeping it relatively cool.' 1.lie bnlb'4 ylia's a reduced portion 22 permitting the removal of" a' single bai' 1G yat a time so ythat by 'irst removing the bar or bars, it'. l' any, between a broken or damaged bar and the reduced portion '22, such damaged or broken bar may "be replaced without the necessity of removing lall the bridge bars or Without 'the necessity of scrapping an en- -a single casting instead of including a suitable number of small castings represented by the individual bridge bars.

` When the bridge wall is in operation and thejgrate bars '1 support burning fuel, a minimum amount of air continuously flows through the damper and through the air ducts in the brid'gewall. -lVith certain lkinds -of fuelr and with the fire clean such amount of..air may be Ifound sufficient to cause com- -bllstionof'smoke coming from the burning fuel.7 so that the bridge Wall then acts as an efficient smoke consumer. At the same time 'such amount-,ofv air is'suiticient to maintain thebridge wall in a vvvorkably cool condition. AThe vair reaching the bridge wall. bars through the danipervtirst passes along the l under face of the grate, thus becoming more 'or -less heated with the heat increasing as the heated air passes through the damper and throughthe hot bridge Wall bars, all this contributing to the etiiciency of the air in causin the burning upof thesmoke. y

Fuel ogcertaingrades or fuel under cerl tain conditions 'requires a-larger amount Aof i. site'degree. This, of course is readily perair than the' minimum amount. dontinuouslyl lowingthrough the closed damper. Under such circumstances the smoke is not completely consumedv and hence it is necessary Ito rovide a greater amount of air which may e done by opening the damper to the requi- `:formed by la suitable mani'gulation of the reach rod 14 or otherl structure which may he t5 provided for the actuation of the danipei'.

.\v certain amount of ashes ,always finds" its way between the bridge'bars and the ashes are caught upon the plate 5 and the" plates 1:2 underriding the openings 8. The

damper 10 is located-in underlying relation to the plate 5 and the bridge wall bars, soy

that such Aashes as may t'all through the group ot' bridge wa-ll bars naturally7 gravitate to the plates 1'2 and to the portions of the plate 5 between the passages 8. Theselast-named portions may be relatively narrow, so that only. a smallI amount of ashes can ever accumulate vthereon, while the greater portion ofthe ashes passing between the-bridge wall .bars reaches the plates 12. It Vthe damper be in 'the closed position lthe ashes will accumulate on the plates 12.but may be dumped from time to time,I by momentarily openii'ig i the damper. If the dani )er be-alieadv o ieiied as occurs underl l i Sonie', conditionsnfytlie plates 1;? will:itlienfbe in a slanting position because of the hiiiging ot' the damper' along one edge and ashes reaching.; the plates willnaturally slide therefrom into. the ash pit.

In this way the space beneath the bridge bai'sis always kept free from any such accumulations of ashes as might reach the bridge bars'and canse them to be burned out., such burning occurring very rapidly'7 in he event ot the ashes reaching the bridge iai-s.

The damper therefore not only per-- forms the functions of a damper, but of a grate, keeping the space beneath the bridge wall 'bars t'ree troniaccumulations of ashes detrimental to the bridge wall bars.

lhilc the supporting wall 3 for the bridge bars is shown' inthe torni of a plate, it will be understood that it may be of any suitable construction and arranged in any suitable way to 'constitute a support for the bridge b'ais and for the plate 5, so that the bridge wall structure including the bridge wall bars may lbe entirely independent and separate from the support for the grate bai's and may Vbe installed in a furnace in connection with any suitable type of grate. replacing brick or other bridge walls which may have been installed inthe furnacel that is claimed is i `1. A-bridge wall for` furnaces having grate bars, comprising a series of slanting bars rising away from 'the grate bars, a support `for the slant-ing bars having a substantially 'horizontal portion underlying the bar-s and provided with 'passages therethrough, and

lan upright portion carrying the high ends lof the slanting bars, land a pii'oted dampenf underlying the substantially horizontal portion and provided with a. series of passages alternating With those of said horizon tal portion, the substantially horizonte;

portion. and the damper having coacting means for preventing tight .closure of the damper, whereby to provide nnnimum ail passages .when thedamper is in a substantially horizontal closed position.

2. A bridge Wall structure `for furnaces having grate bars and a .support for the rear ends of the grate bars, 'comprising bridge bars, a support for the bridge bars Separate from the support for the grat( bars and including alisubstaptlally upright and a substantially hrizontal portion foi sustaining the bridge bars in a slanting po sition with,theirlowermost ends adJacent tt the grate bars, and a hinged damper under lying the' horizontal portion o fpthc sup "port, said damper and horizontal portion, of. the support each having passages there through, with the passages of one alternat ing Vwith those of the other to form a sub stantially continuous support for ashes fall ing through the bridge wall when the darn lper is closed, the parts of the damper regis- .-zontal portion of the support when tering with the passages through the hori` zontal 4portion of the support bemg 1n a lower plane thanand spaced from the h-ildamper is in the closed'position.

Abridge wall Structure `for furnaces having-grate bars and supporting means therefor, comprising slanting brldge bars,

a. substantially horizontal plate with spaced passages therethrough, one edge of the imi platel being located adjacent to the supportfor the grate bars, a `wall rising from that edge Vo theplate remote' from the gratebars and constituting a support for the `upper ends of thev bridge bars with the lowerend resting on the plate adjacent to the support for'the grate bars, and a damper in' underlying relation and hinged to the plate and provided with spaced passages alternating with those through the piate,thc parts of the damper between the passages therethrough being at all times spaced from the plate. 4. A bridge wall' structure for furnaces having grate bars and supporting means therefor, comprising slanting bridge bars, a substantially horizontal plate 'with spaced assages therethrough, one edge of the plate eing located adjacent to the support for the grate bars, a wall rising from that edge of theplate remote from the grate bars and 'constituting a support for the upper ends of the bridge bars'Y with their lower lends resting on the plate adjacent. to the support ing with those through thel plate, said dam- 'Y er' having spacing devlces` thereon forl olding those partsof the damper between the spaces therethrough in spaced relation to the solid parts of the plate toward which the damper closes.

5. A bridge wall structure for furnaces having grate bars and supporting means therefor, comprising bridg(l bars with air passagestb1ough' \\'hich ashesjmay fall, a substantially horizontal damper scat with spaced passages and u 'ith the front edge adjacent to the'rear ends of the grate bars, said damper scat being in luulerridiug rela tion to the bridge bars, and a hinged damper underlying the danlpcr seat and movable toward and from the latter about its hinges, said damper having Yspaced pas sages therethrough alternating with those. through the seat and said damper having spaced means for holding the damper in spaced rclationto its seat when the damper- Wall, and the spacing of the damper from its'scat provides for the constant admission of a mlnnnum amount of an' to the bridge `wall when the damper is inthe closed po.v

siti on.

'6. In a furnace having grate bars and a support for the rear; ends of the grate bars, a bridge wall comprising a substantially horizontal plate extending rearwardly from the grate bar support, an Aupright Wall rising from the rear ledge of said plate, bridge bars each carried at one end by the `upperx end of the upright Wall and slantng downwardly to and supported atthelower end by the front end of the horizontal plate, the assembled bridge bars having air lpassages through which ashes may fall, and a Ydamper underlying the horizontal plate4 and comprising longitudinal bars and spaced transverse plates, with the bars on thev face of the dampertoward the horizontal plate andilthe spaced plates defining passages between them alternatin with the, passages through the horizonta plate, whereby .the damper when closed toward the horizontal' co atitutes', together withv the horizontal plid, a support for ashes falling through the bridge Wall. K

` 7. In a furnace having gratebars andl a support for the rear ends of. the grate bars,fv a bridge wall structure comprising a substantially horizontal plate .with passagolal therethrough extending rearwardly from the support for the rear ends of the grate bars, an Aupright wall rising from the rear edge of the lplate, bridge bars carried at their upper en s by and extending from the upper edge of the upright. 'wall Vand slanting. downwardly and forwardly to and resting at their lower ends upon 'the front edge of thejhorizontal plate,nand a hinged Vdamper underriding the` horizontal ,plate 11o plate to a substantially horizontal position and movahlu to 'zn' :md from the under face. ('hox'vof :\ml ]1'o\' lvl`l with moans lfor spacing thu (humour from the plat when the huupel is n :1 horizontal'pmtonT whvuhy thv (lnmlwr whmx hx thu ('losvd posiou is so spzuml fronrtho pluto :xs to constantly zuhntn muhhlun amount o'l: nii' through the hr'g'lgo hars.

In testimony, that I claim the foregoing as my own, I have hereto axcd my sgna- 1v ln'v m tho p11-,Senco of two wtncssvs.

'.IHOMAS WAKEFULLI).

R. Il. Comsuxm, Il. Ummm 5' ll. is hm'uh) r'iurtiificli Minty Letters Primm. No. 1,250,732, grmmud Duwmlmr 1s, H117, upun bhv nppivutmi of 'Vhunms Wakvlivld, nf Fillnorv. New Yml. fm' mi improvement ih lrillgv-Wnlls nr lfurnnccs," were vrrnnvuusly issued (.n Hcrhmt Cline, :is nssignw nl' thv untirv right in mill invcntinn, whcrcaw said Letten Piment should huw hmm issul-rl Ln thu invvlltor. :will "u-r/r'ld, um] Herbert f'. (L'l'im'. snill i Clim: lining nwnvr uf urn-[nuff unly uf Suid im'vnbiuu. ns shown by thu rcvurlls uf nssignmcnts in [.h ultimi; and that. the Suid Luthers Patent shmlhl bc ruud with this vnrrcx-.t-inn therein tlml thv same muy vnnfmm 1n (.hv rvr-.mui nf t-h vaso in thv nl. nu 75.

Correction in Letters Patent No. 1,250,732.

isf.. 

